<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>

  <style>
    .box{
      width: 500px;
      height: 500px;
      background-color: #aaa;
      display: flex;
      /* flex-direction: column;
      justify-content: center;
      align-items: center; */

      flex-wrap: wrap;

      align-content: space-around;
    }
    .item{
      width: 200px;
      height: 50px;
      background-color: rgb(238, 71, 20);
      /* flex-shrink: 1; */
      /* flex-grow: 0; */
      /* flex-basis: 200px; */
      /* flex: 0 0 200px; */
    }
  </style>
</head>
<body>
  <div class="box">
    <div class="item">1</div>
    <div class="item">2</div>
    <div class="item">3</div>
    <div class="item">4</div>
  </div>
</body>
</html>